|
|
A177010
|
|
G.f.: ((1-q)^2+(1+q)*sqrt(1-6*q+q^2))/2.
|
|
4
|
|
|
1, -2, -3, -8, -28, -112, -484, -2200, -10364, -50144, -247684, -1243816, -6331164, -32591184, -169376484, -887465784, -4682990076, -24864759744, -132745182724, -712136879944, -3837043171100, -20755343638064, -112668274522852, -613581530620888, -3351355226348668, -18354390999804832, -100771410237846404, -554536090460808680
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,2
|
|
LINKS
|
|
|
MATHEMATICA
|
CoefficientList[Series[((1 - x)^2 + (1 + x) Sqrt[1 - 6 x + x^2])/2, {x, 0, 27}], x] (* Michael De Vlieger, Oct 12 2016 *)
|
|
CROSSREFS
|
Cf. A010683 (a closely-related g.f.)
|
|
KEYWORD
|
sign
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|